(1):
(v. t.) To confirm; to make certain or secure.
(2):
(v. t.) To insure; to covenant to indemnify for loss, or to pay a specified sum at death. See Insure.
(3):
(v. t.) To make sure or certain; to render confident by a promise, declaration, or other evidence.
(4):
(v. t.) To declare to, solemnly; to assert to (any one) with the design of inspiring belief or confidence.
(5):
(v. t.) To affiance; to betroth.